Cheat mode
Press [L], [R]x2, [L]x2, [R] at the options screen. A sound will confirm correct code entry. Hold [L] + [R] and press [Start] to choose any game mode. Then, hold [L] + [R] and press [Start] to display a cheat menu, with options for unlimited lives, level select, and blood mode. Note: Blood mode may not be enabled in the Japanese version of the game.

Display score
Press [Start] to pause game play. Hold [L] + [R] and press [X]x3. Replace the controller with a light gun after the code is enabled to resume game play.

Unlimited ammunition
Press [Start] to pause game play. Hold [L] + [R] and press [Y]x3. Replace the controller with a light gun after the code is enabled to resume game play.

Play as Sophie or a researcher
Select Saturn mode. Hold [L] + [R] and press [Up], [Down], [X], [Y], [Z] at the character selection screen. Replace the controller with a light gun after the code is enabled to resume game play.